Wood-grinder



(No Model.)

E. F. 'MILLARD WOOD GRINDER.

Patented June 23 UNITED STATES PATENT- OFFICEo EDWARD F. MILLARD, OFMARINETTE, YVISCONSIN.

WOOD-GRINDERJI SPECIPICATION forming part of Letters Patent No. 320.574,dated June 23, 1885.

Application filed January 31, 1885.

To all whom it may concern:

Be it known that I, EDWARD F. MILLARD, a citizen of the United States,residing at Marinette, in the county of Marinette and State ofWisconsinyhave invented a new and useful Improvement in Wood-Grinders,of which the following is a specification, reference being had to theaccompanying drawings.

My invention relates to an improvement in wood-grinders for makingpaper-pulp; and it consists in the peeuliar construction and combination of devices that will be more fnlly set forth hereinafter, andparticularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical longitudinalsectional View of a `machine that embodies my invention. Fig. 2 is a topplan view of one of the hoppers, showing the follower therein. Fig. 3 isa detailed View of one of the side plates of the hoppers.

A represents a grinding-stone, and B represents a series of hoppers,which are arranged around the upper edge of the stone in the form of anarc, as shown. The sides of these hoppers are formed by the plates G,which are provided at their centers on their opposing faces with thevertical ribs D, which are adapted to receive and guide the groovedantifriction wheels E, tha-t are journaled in blocks F, that are boltedto the upper sides of the followers G. Near the outer edges of theplates C, on their opposing faces, are formed the projecting flanges H,having inclined inner edges, I. to each other at the upper sides of theplates, and gradually recede from each other as they approach the lowersides of the plates, as shown.

The billets or blocks of wood which are to be ground by the stone areplaced in the hoppers, and are prevented from coming in contact with theinner sides of the -plates C by means of the inclined edges of theflanges H, and thus friction between the blocks of wood and the innersides of the plates is prevented.

These fianges approach nearest (No model.)

XVhen enough of the wood has been ground away to clear the blocks fromthe flanges H, the followers, which bear upon the upper sides of theblocks, hold said blocks against lateral movement, and thus prevent theblocks from coming in contact with the flanges H of the side plates ofthe hoppers while being ground.

By means'of this invention I ani enabled to feed the blocks of wood tothe grindstone without friction between the blocks and the side plates,as will be Very readily understood. p

Having thus described my invention, I e

clain- 1. The' conbination of a grindstone with the hoppers havingprojecting flanges on their opposing sides, for the purpose set forth,substantially as described.

2. The combination of a grindstone with the hoppers having inclinedprojecting flanges on their opposing faces, and followers that areadapted to move in the hoppers, substantially as described. p\

3. The combination of a grindstone with the. hoppers having their sidesiormed of plates, which plates are provided with a ver-- my own I havehereto affiXed my signature in' presence of two witnesses.

EDWARD F. MILLARD.

Witnesses:

JOHN B. FAIRCHILD, A. A. FAIRCHILD.

